Bacharach H-25C, Инструкция

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H-25C Instruction Manual
Instruction 3015-0216
28
3.1 Auto Calibration
This auto calibration procedure can be used only if the instrument is equipped with the auto calibration
option. Auto calibration is not possible when the measurement mode is set to B-type; always set the
mode to A-type for auto calibration.
3.1.1 Setting the Switches
Auto calibrations are performed with the " CAL " switch in the setup area set to the AUTO " position.
Re-setting of " GAS " and " UNIT " switches is not necessary.
Note : The calibration gas always flows out from the 'CAL PORT" at a flow rate corresponding to the
secondary pressure.
Note that the calibration gas used in the H-25C's optional built-in leak standard is R 134a. At a
secondary pressure of 170 kPa {1.7 kgf/cm
2
} this cal gas will flow out from the " CAL PORT " at a rate of
9 X 10
-5
to 11 x 10
-5
std. ml/s.
3.1.2 Operator Actions and the Calibration Operation
Inserting the probe tip into the "CAL PORT” causes a switch inside the port to turn on, starting calibration.
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CAUTION: If an S - probe is to be used, remove the tube for introducing gas. Inserting the tube for
introducing gas into the "CAL PORT' may damage the spring switch in the detector. If the tube is removed,
exercise care not to lose the filter that is in the probe.
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